jaceklaskowski

Rough Notes about CQRS and ES

Once upon a time…

I once took notes (almost sentence by sentence with not much editing) about the architectural design concepts - Command and Query Responsibility Segregation (CQRS) and Event Sourcing (ES) - from a presentation of Greg Young and published it as a gist (with the times when a given sentence was heard).

I then found other summaries of the talk and the gist has since been growing up. See the revisions to know the changes and where they came from (aka the sources).

It seems inevitable to throw Domain Driven Design (DDD) in to the mix.

ttscoff

#!/usr/bin/ruby
# Convert a Markdown README to HTML with Github Flavored Markdown
# Github and Pygments styles are included in the output
#
# Requirements: json gem (`gem install json`)
#
# Input: STDIN or filename
# Output: STDOUT 
# Arguments: "-c" to copy to clipboard (or "| pbcopy"), or "> filename.html" to output to a file
# cat README.md | flavor > README.html

jstorimer

#!/usr/bin/env ruby

# A simply utility to show character counts for each line of input and
# highlight lines longer than 80 characters.
#
# Written as an example for http://jstorimer.com/2011/12/12/writing-ruby-scripts-that-respect-pipelines.html
#
# Examples:
#
# $ hilong Gemfile

tmm1

module EventMachine
  # A simple iterator for concurrent asynchronous work.
  #
  # Unlike ruby's built-in iterators, the end of the current iteration cycle is signaled manually,
  # instead of happening automatically after the yielded block finishes executing. For example:
  #
  #  (0..10).each{ |num| }
  #
  # becomes:
  #